학술논문
Multi regression analysis of water quality characteristics in lowland paddy fields / 低平地水田地帯における水利施設の影響下にある農業排水水質の重回帰分析
Document Type
Journal Article
Author
Source
Proceeding of Annual Conference. 2012, :176
Subject
Language
Japanese
Abstract
In this study, discharge data (velocity and level) in a drainage channel was monitored by an Acoustic Doppler system and water quality was sampled at same time. The data was analyzed by a multi regression model to realize hydrological and environmental factors to influence with nitrogen concentration. The study area was located inside Sakura river watershed in Kasumigaura basin, and lowland paddy fields are mainly occupied in the study area. Circulated irrigation, pump up from drainage water, was conducted in a part of this area. The results showed the difference tendency between irrigation and non-irrigation period. T-N concentration would be decreasing with COD concentration increase in perfect overflow, and incresing with high rainfall intensity. Those influenced factors would be considered in water quality model developing in future.